Wilhelm meter



(No ModeI.)

INVENTUR.

30 bon-,S 1r.

lUNITED STATES PATENT OFFICE.

VILHELM MEYER, OF NEV YORK, N. Y.

PRESSURE-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 392,447, dated November 6, 1888.

Application filed June 2l., lSSS. Serial No. 277,795. (No model.)

1o so constructed that it may be set to any desired pressure.

The invention consists in the various features of improvement, more fully pointed out in the claim.

i 5 In the accompanying drawings, Figure 1 is a vertical central section of my improved apparatus on the linexx, Fig. 2. Fig. 2 isalongitudinal section on line y y, Fig. l.

The letter a represents a cylindrical chamz ber connecting at one end by tube c' with the Compressed-air receiver or air-pump and at the other en d by tube ai with a second chamber which serves for regulating the pressure in a second barrel. Into the chamber a there 25 is secured the threaded neck bf of a tapering cup, b, which is closed ou top by a cover, b2. The upper edge of cup b is iianged, as at b3,

and the cover b2 is also flanged, as at b4, the' flanges b Z4E being tightly joined by screwrIhe cup b communicates by tube o with the beer-barrel, the tube chaving a checkvalve, c', to prevent back-pressure. The neck b of cup b has a central perforation for the admission of a valve-stem, d, anda number of 3 5 lateral perforations, e, for the admission of air.

The valve-stem d carries at its lower end the valve d, that projects over the perforations e, while at its upper end the stem d is joined to a disk, d2. This disk is bolted to a similar up- 40 per disk, da, but between the disks there is placed a flexible diaphragm, f, the edge of which is rmly held between the iianges b3 b". To the upper disk, d, there is connected a rod, g, projecting upwardly through a perforated screwplug, h, that is screwed into a threaded neck, h', of cover b. The rod g is surrounded by a coiled spring, i, one end of which bears or acts against disk d and thus against the diaphragm, while its other end bears against the lower face of the screw-plug h.

It will be seen that by screwing the plug l1, farther in or out the tension of the spring z' is varied, and thus the pressure on the diaphragm f can be altered.

The operation of the device is as follows: The x air from tube a enters chamber a, and thence enters cup b through openings e. In the cup b the air presses against diaphragm f and escapes also through tube c into the beer-barrel. rI'he spring z' having been adjusted to any desired amount of air-pressure, it will be seen that when such pressure is exceeded the diaphragm f will be forced upward by the compressed air in cup b against the action of spring i. Thus the valvestem cl will be drawn upward and the valve d will be brought nearer to openings e to diminish the volume of air admitted into cup b. In this way the pressure will be automatically regulated. If a different pressure is desired, it is only necessary to turn the screw-plug h.

Vhat I claim is- The combination of cup I), having flange b, and a neck, b, that has a central perforation and a number of lateral perforations, e, with valve d', the stem d of which passes through said central perforation, and with the diaphragm f, and with disks d2 d3 on opposite sides thereof, and with ianged cover be, rod g, nu't 71 and spring i', and with exit-pipe c, having check-valve c', the diaphragm f being clamped between the flanges of the cup and cover, substantially as specified.

VILHELM MEYER.

Witnesses:

F. v. BRIEsEN, HENRY E. ROEDER. 

